Pressure-regulator.



I. J. RALSTON & J. A. BRIGGS.

PRESSURE REGULATOR.

APPLICATION FILED 111111119, 1911.

Patented Mar. 12, 1912.

ATTORNEYS DLUMBM PLANOQRAPH C0. WASHINGTD. D: D

UNTED STATES PATENT OFFICE.

ISAAC J. RALSTON AND JESSE A. BRIGGS, OF KANE, PENNSYLVANIA, ASSIGNORS0F ONE-THIRD 10 HUGO J. WALTER, OF KANE, PENNSYLVANIA.

PRESSURE-REGULATOR.

Specification of Letters Patent.

Patented Mar. 12, 1912.

Original application filed June 5, 1909, Serial No. 500,304. Divided andthis application filed. June 19, 1911. Serial No. 633,920.

To all whom it may concern:

Be it known that we, Isaac J. ltaLs'roN and Jnssn A. Baines, bothcitizens of the United States, and resident of Kane, in the county ofMcKean and State of Pennsylvania, have invented a new and ImprovedPressureRegulator, of which the following .is a full, clear, and exactdescription.

This invention relates to a new and improved pressure regulator, and isa division of our application for glass-drawing mechanism, Serial No.500,304, filed June 5, 1909.

An object of this invention is to provide a new and improved pressureregulator whereby the pressure of the air or other fluid supplied to theinterior of a cylinder or receptacle will be automatically regulated bythe pressure in the cylinder or receptacle itself.

A further object of this invention is to provide an automatic pressureregulator, which will be simple in construction, inexpensive tomanufacture, positive in its action, and adjustable, to vary the timingof its action.

These and further objects, together with the construction andcombination of parts, will be more fully described hereinafter andparticularly set forth in the claims.

Reference is to be had to the accompanying drawing forming a part ofthis specification, in which the figure is an elevation, partly insection, of the improvement.

Referring more particularly to the separate parts of this invention asembodied in the form shown in the drawing, 9 indicates a pipe readingfrom the bottom of the casing 12 and through which air is conveyed fromthe casing to a cylinder or receptacle. Adj acent the point where thepipe 9 enters the casing 10, there is provided a suitable vent pipe 13,which has an opening 14, closed in any suitable manner, as by means of asliding sleeve 15, with a registering opening, operated by a pm 16working in a slot in the vent pipe 13.

The air is supplied to the casing 12 through the main-supply pipe 11,from any suitable source, such as a blower, not indicated. The aircoming through the pipe 11 is regulated. before passing into the casing12, by a control, which embodies an automatically-operated valve 17,which derives its movement by virtue of the change of pressure in thecasing 12 and thus in the interior of the cylinder or receptacle, whichis connected to the casing 12. lhe valve 17 engages its seat 1S locatedin a valve casing 19 on the main-supply pipe 11. The valve 17 ispivotally connected by its spindle 20 to a lever 2l, which is pivoted orfulcrumed on a link 2, which in turn is pivotally connected to the valvecasing 1S). lhe connection of the lever 2l to the link is preferablyadjustable, so as to vary the fulcrum point, as by means of a pin Q3engaging any one of a plurality of openings 24 on the lever 21. Thelever 2l has slidingly mounted thereon a plurality of weights and 26,which, by adjustment on the lever, can vary the pressure at which thevalve 17 will open and close, to a niccty. One end of the lever 21engages in a slot .27 in a connecting rod 9.8. This slot permits alimited movement of the connecting rod relative to the lever beforeactuating the latter. The connecting rod 2S is secured to a frame 29,which is mounted to move slidingly in any suitable manner, as byslidingly engaging the casing 10. This frame 29 is adjustably connectedin any suitable manner, as by means of a rod 30, to a flexible diaphragm8l, which forms one of the walls of the casing 10.

lt will thus be seen that when the pressure in the cylinder orreceptacle becomes greater than is desired, which amount can beregulated previously by an adjustment of the coluiterweights Z5 and 20,the air or other fluid being used to create a pressure in the interiorof the cylinder or receptacle,will back up into the casing 12 asufficient amount to raise the diaphragm 31 more or less, so that itsmovement, after a limited movement with the rod QS and the lever 21,will raise the lever Q1 so as to bring the valve 17 closer or onto itsseat 1S. It will thus be seen that the air being supplied to theinterior of the cylinder or receptacle will be cut ott' or diminishedbefore it comes to the casing 12, whereby the pressure in the cylinderor receptacle will be diminished until it has reached such a degree aswill permit the counterweights Q5 and 2G to act so as to open the valve17, by drawing down on the rod 28, so as to collapse the diaphragm 31.

Vhile we have shown one embodiment of our invention, we do not wish tobe limclaim as new and desire to secure by Letters ited to the specificdetails thereof, but desire to be protected in various changes,alterations and modifications which may come within the scope of theappended claims.

Having thus described our invention, we

Patent :u

1. A pressure regulator, comprising` a casing having a flexiblediaphragm forming the top thereof and provided with supply and dischargepipes, a frame mounted to slide on the casing, a rod connecting theframe with the diaphragm, a valve casing interposed in the supply pipe,a valve in the valve casing and having its stem projecting through thetop of the same, a counter balanced lever to which the valve stem ispivoted, a link pivoted to the casing and upon which the lever isadjustably fulcrumed and a rod depending from the sliding frame andhaving a slot in its lower end through which one end of the said leverprojects.

2. A pressure regulator comprising a casing having a flexible diaphragmforming one wall thereof and provided with supply and discharge pipes, aframe mounted to slide on the casing and connected with the diaphragm, avalve casing in the supply pipe, a valve in said casing and having itsstem projecting through the salne, a counter-balanced lever adjustablymounted on the valve casing and to which the valve` stem is pivotallyconnected, and a rod carried by t-he sliding frame and provided with aslot through which the said lever projects.

3. A pressure regulator, comprising a casing having a diaphragm forminga wall thereof and provided with supply and discharge pipes, a slidingframe connected with the diaphragm, a valve casing in the supply pipe, avalve in the valve casing and having its stein projecting out throughthe same, a link pivoted to the casing, a counter-bal anced leveradjustably fulcrumed on the link and to which the valve stem ispivotally connected, and a connection between the counter-balanced leverand the said sliding frame.

4L. A pressure regulator, comprising a casing having a fiexiblediaphragm forming the top thereof and provided with supply and dischargepipes, a frame mounted to slide on the casing, a rod connecting the topof the frame with the diaphragm, a valve casing interposed in the supplypipe, a valve in the said casing having its stem projecting out throughthe same, a counterbalanced lever fulcrumed on the valve casing and withwhich the valve stem is pivotally connected, and a rod depending fromthe lower partof the frame and having at its end a slot through whichthe lever projects.

In testimony whereof we have signed our naines to this specification inthe presence of two subscribing witnesses.

ISAAC J. RALSTON. JESSE A. BRIGGS. Witnesses:

XVM. Barcos, H. J. VALTER.

ACopies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

